VCO RM



The Analogue Solutions VCO-RM is a single VCO-RM laid out in a similar way to the VCO section you would find on a monosynth. VCO-RM includes a glide (slew) function, so this is a great bonus. VCO-RM can go down to low frequencies so they can be used as an LFO. It also has a complete and independent Ring Modulator. This can be used on its own, or you can patch the oscillator into the RM, and along with another audio source gives you great Ring Mod’d sounds.

Ring Modulation

VCO-RM features a high quality Ring Modulator very similar to those found in the Roland System 100m, EMS VCS3 and ARP2600. What the RM does is take 2 audio inputs, which we will call X and Y, then produce an output that contains the original frequencies X and Y, as well as the sum and differences of X and Y (X+Y, X-Y). In non-technical speak, the RM best produces metallic sounding bell and clang sounds. The output is rich in harmonics and can often sound quite abbrasive. So filtering is necessary and the sound is best used for effects. The RM is a vital processor producing it’s own unique sound vital in an system.

RM In Use

Basically experiment with any two audio sources. The type of input signal (waveform) and pitch will alter the output. By slowly changing the pitch of one input some dramatic sounds can be produced. Note, the RM is completely independent from the VCO.

Controls In Detail

Tune

The VCO has a wide ranging tune control. Turning Tune alters the basic pitch of the oscillator.

Glide

Turning up Glide adds portamento to the oscillator, so the pitch will bend (slide) up or down to each note (as opposed to a sudden change). The higher the setting, the longer the oscillator takes to reach its new note. Not many VCO modules give you the all important Glide control as standard!

Triangle Level

This sets the output volume of the triangle waveform output.

Sawtooth Level

This sets the output volume of the sawtooth waveform output.

Square Level

This sets the output volume of the square waveform output.

Sockets in Detail

CV in

This socket is the pitch CV control input and is used to control the pitch of the oscillator.

Sync In

This is an oscillator Sync reset input.

Triangle Out

This is the audio output for the Triangle waveform. Its level is affected by the Triangle level pot.

Sawtooth Out

This is the audio output for the sawtooth waveform. Its level is affected by the sawtooth level pot.

Square Out

This is the audio output for the square waveform. Its level is affected by the square level pot.

RM X input

The X audio input to the Ring Modulator

RM Y input

The Y audio input to the Ring Modulator

RM output

The RM output

General Specification

Inputs

CV

PW

RM X

RM Y

Outputs

TRIANGLE

SAW

SQUARE

RING MOD

Controls

Tune

Glide

Pulse Width

Saw Level

Square Level

Size

12HP, 3U Euro

Power

+/-12V, GND using Doepfer power socket.

Note: This module is at a higher octave than our other VCOs. This module has a push-pull octave switch built into the TUNE knob. Pull to lower the octave (if required!).